A woman has warned about a "sinister" scam voicemail claiming to be from HM Revenue and Customs.
Rebeckah Vaughan, from Wirral, received the menacing phone call yesterday and was shocked by its contents.
The former Big Brother contestant posted a warning to friends on Facebook.
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The message states: "I need you or your retained solicitor to call back us back.
"The issue at hand is extremely time sensitive. This is officer Dennis Gray from HM Revenue and Customs.
"The hot line to my diversion is 02037709649. I repeat 02037709649.
"Do not disregard this message and call us back. If you do not call us back or we do not hear from your solicitor either then get ready to face the legal consequences.
"Goodbye and take care."
Rebeckah, who was concerned elderly people could fall for the scam, said: "How sinister is this message!
"It’s not from HMRC it’s a scam but I worry that because of the tone of it someone may fall for it.
"If you receive a message like this don’t call the number back."
Fraudsters often pretend to be legitimate government organisations like HMRC in order to steal people's details, in a type of scam known as phishing.
HMRC urges people to report suspicious emails and details of suspicious phone calls to its own anti-phishing team, who can be contacted at phishing@hmrc.gov.uk.
You can forward suspicious text messages to 60599. Text messages will be charged at your network rate.
HMRC never send notifications of a tax rebate or ask you to disclose personal or payment information by email or text message.
You can also find out more about the real phone calls made by HMRC here.